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通用移动通信系统 (UMTS)是欧洲的第三代移动通信系统标准 ,其一般结构从物理和功能的角度进行了模型化。在物理方面用域的概念进行模型化 ,在功能方面用层的概念进行模型化。UMTSphase 1规范的业务包括终端业务与补充业务、传真业务、承载业务和紧急呼叫等。在此基础上对UMTS接入网和核心网的功能以及网络安全特性进行了介绍。最后提出中国第三代移动通信系统的网络结构应采用UMTS网络结构 ,并根据中国的具体条件 ,逐步建成先进的第三代移动通信系统
Universal Mobile Telecommunications System (UMTS) is the third generation mobile communication system standard in Europe, and its general structure is modeled from a physical and functional point of view. In the physical domain with the concept of modeling, in the functional aspects of the concept of modeling. UMTSphase 1 standard services include terminal services and supplementary services, fax services, bearer services and emergency calls. On this basis, the functions of UMTS access network and core network as well as the network security features are introduced. Finally, it is proposed that the network structure of China’s third generation mobile communication system should adopt the UMTS network structure and gradually build an advanced third generation mobile communication system according to China’s specific conditions